The interaction of graphite grains with a hot gas is investigated. Detailed computations, based on experimental data and simple theoretical models, are presented of the energy transfer by gas particle collisions and of the sputtering rates and grain lifetimes, as functions of gas temperature and grain radius. The electric charge on the grains is calculated, and the effect of electric forces on mechanical stability is discussed. The rate at which the gas cools by this mechanism is evaluated. Subject heading: interstellar matter
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Burke et al. (1974) studied this question.
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